diff --git a/tests/rules/data/query-plan-analyzer.php b/tests/rules/data/query-plan-analyzer.php
index 00ec3ce7e..4d8cf3989 100644
--- a/tests/rules/data/query-plan-analyzer.php
+++ b/tests/rules/data/query-plan-analyzer.php
@@ -58,6 +58,11 @@ public function unknownQuery(Connection $conn, string $query): void
 
     public function nonSimulatableQuery(Connection $conn, $email): void
     {
-        $conn->executeQuery('SELECT * FROM ada WHERE email = '.$email);
+        $conn->executeQuery('SELECT * FROM ada WHERE email = ' . $email);
+    }
+
+    public function unknownConstant(Connection $conn): void
+    {
+        $conn->executeQuery('SELECT * FROM ada WHERE adaid = ?', [CONSTANT_DOES_NOT_EXIST]);
     }
 }
diff --git a/tests/rules/data/syntax-error-in-prepared-statement.php b/tests/rules/data/syntax-error-in-prepared-statement.php
index ca7f3dbc3..7af4cb25f 100644
--- a/tests/rules/data/syntax-error-in-prepared-statement.php
+++ b/tests/rules/data/syntax-error-in-prepared-statement.php
@@ -323,4 +323,9 @@ public function preparedNamedParamsSubstitution(Connection $connection)
     {
         $connection->preparedQuery('SELECT email FROM ada WHERE email = :param OR email = :parameter', ['param' => 'abc', 'parameter' => 'def']);
     }
+
+    public function unknownConstant(Connection $connection)
+    {
+        $connection->preparedQuery('SELECT email FROM ada WHERE email = :param OR email = :parameter', ['param' => CONSTANT_DOES_NOT_EXIST, 'parameter' => 'def']);
+    }
 }
diff --git a/tests/rules/data/syntax-error-in-query-method.php b/tests/rules/data/syntax-error-in-query-method.php
index e85dc8354..726d94d46 100644
--- a/tests/rules/data/syntax-error-in-query-method.php
+++ b/tests/rules/data/syntax-error-in-query-method.php
@@ -117,4 +117,9 @@ public function conditionalSyntaxErrorInQueryUnion(PDO $pdo)
 
         $pdo->query('SELECT email, adaid FROM ada '.$add.' LIMIT 1', PDO::FETCH_ASSOC);
     }
+
+    public function unknownConstant(PDO $pdo)
+    {
+        $pdo->query('SELECT * FROM ada WHERE doesNotExist='.CONSTANT_DOES_NOT_EXIST, PDO::FETCH_ASSOC);
+    }
 }